package com.bootdo.api.textUtil;

import java.security.MessageDigest;

import javax.crypto.Cipher;
import javax.crypto.spec.SecretKeySpec;

import org.apache.commons.codec.binary.Base64;

public class Encipherment {
	// 加密
    public static String Encrypt(String sSrc, byte[] sKey) throws Exception {
        if (sKey == null) {
            System.out.print("Key为空null");
            return null;
        }
        SecretKeySpec skeySpec = new SecretKeySpec(sKey, "AES");
        Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");//"算法/模式/补码方式"
        cipher.init(Cipher.ENCRYPT_MODE, skeySpec);
        byte[] encrypted = cipher.doFinal(sSrc.getBytes("utf-8"));

        return new Base64().encodeToString(encrypted);//此处使用BASE64做转码功能，同时能起到2次加密的作用。
    }

    // 解密
    public static String Decrypt(String sSrc, byte[] sKey) throws Exception {
        try {
            // 判断Key是否正确
            if (sKey == null) {
                System.out.print("Key为空null");
                return null;
            }
            SecretKeySpec skeySpec = new SecretKeySpec(sKey, "AES");
            Cipher cipher = Cipher.getInstance("AES/ECB/PKCS5Padding");
            cipher.init(Cipher.DECRYPT_MODE, skeySpec);
            byte[] encrypted1 = new Base64().decode(sSrc);//先用base64解密
            try {
                byte[] original = cipher.doFinal(encrypted1);
                String originalString = new String(original,"utf-8");
                return originalString;
            } catch (Exception e) {
                System.out.println(e.toString());
                return null;
            }
        } catch (Exception ex) {
            System.out.println(ex.toString());
            return null;
        }
    }
	
	 /** 
     * @Description:加密-32位小写 
     * @author:liuyc 
     * @time:2016年5月23日 上午11:15:33 
     */  
    public static String encrypt32(String encryptStr) {  
        MessageDigest md5;  
        try {  
            md5 = MessageDigest.getInstance("MD5");  
            byte[] md5Bytes = md5.digest(encryptStr.getBytes());  
            StringBuffer hexValue = new StringBuffer();  
            for (int i = 0; i < md5Bytes.length; i++) {  
                int val = ((int) md5Bytes[i]) & 0xff;  
                if (val < 16)  
                    hexValue.append("0");  
                hexValue.append(Integer.toHexString(val));  
            }  
            encryptStr = hexValue.toString();  
        } catch (Exception e) {  
            throw new RuntimeException(e);  
        }  
        return encryptStr;  
    }
}
